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User Psychology

Staggered crossing in Bath

I’ve mentioned a few times, perhaps more often in presentations than on the blog, the fact that guidelines for the design of pedestrian crossings in the UK [PDF] recommend that where a crossing is staggered, pedestrians should be routed so that they have to face traffic, thus increasing the likelihood of noticing oncoming cars, and indeed of oncoming drivers noticing the pedestrians:

5.2.5 Staggered crossings on two-way roads should have a left handed stagger so that pedestrians on the central refuge are guided to face the approaching traffic stream.

When I gave this example of Design with Intent at Lancaster, the discussion – led, I think, by Lucy Suchman and Patricia Clough – turned to how this arrangement inevitably formalised and reinforced the embedded hegemony of the motor car in society, and so on: that the motorist is privileged over the pedestrian and the pedestrian must submit by watching out for cars, rather than the other way around.

Now, all that is arguably true – I had seen this example as merely a clever, sensible way to use design to influence user behaviour for safety, for everyone’s benefit (both pedestrians and drivers) without it costing any more than, say, a crossing staggered the opposite way round – but this is, maybe, the nature of this whole field of Design with Intent: lots of disciplines potentially have perspectives on it and what it means. What a traffic engineer or an ergonomist or a mistake-proofer sees as a safety measure, a sociologist may see as a designed-in power relation. What Microsoft saw as a tool for helping users was seen as patronising and annoying (at least by the most vociferous users). It’s all interesting, because it all broadens the number of interpretations and considerations applied to everything, and – if I’m honest – force me to think on more levels about every example.

Multiple lenses are helpful to designers otherwise stuck at whatever focal length the client’s prescribed.

Back to the crossings, though: the above crossing in Bath is a bit unusual in how it’s arranged with so many control panels for pedestrians. But in general, with simple Pelican and Puffin crossings in the UK, there is a design feature even more obvious, which only struck me* the same day I photographed the above crossing in Bath: the pedestrian signal control panel is usually also to the right of where pedestrians stand waiting to cross, i.e. (with UK driving on the left), in order to press the button, pedestrians have to turn to face the oncoming traffic.

The guidelines actually mention this as helping people with poor vision, but it would seem that it really assists all users, even if only slightly. It means you can watch the traffic as you decide whether or not you actually need to press the button, and will be more likely to be standing in a position where you can see the oncoming traffic at the point when you walk out into the road.

5.1.7 To assist blind and partially sighted pedestrians, as they approach the crossing, the primary push button/indicator panel should normally be located on the right hand side. The alignment should encourage them to face oncoming vehicles. The centre of the push button should be between 1.0 and 1.1 metres above the footway level.

This is the sort of ‘hidden’ intentional, strategic design detailing which fascinates me. It is obvious, it is quotidian, but it’s also thoughtful.

Staggered crossing in Bath

*Looking back through my notebooks, I see that someone actually mentioned this to me at a seminar at Sheffield Hallam in September 2007 but I forgot about it: many thanks to whoever it was, and I should be better at reading through my notes next time!

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Danger sign by a lightning-stricken tree in Windsor Great Park, Berkshire, 2008

Is the impact of the sign’s message increased or decreased by pairing it with a fence?

What about when the fence is flattened?

What about when no-one seems to have found it important to fix?

Why?

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Elevator graph


This is a great graph
from GraphJam, by ‘Bloobeard’. It raises the question, of course, whether the ‘door close’ buttons on lifts/elevators really do actually do anything, or are simply there to ‘manage expectations‘ or act as a placebo.

The Straight Dope has quite a detailed answer from 1986:

The grim truth is that a significant percentage of the close-door buttons [CDB] in this world, for reasons that we will discuss anon, don’t do anything at all.

In the meantime, having consulted with various elevator repairmen, I would say that apparent CDB nonfunctionality may be explained by one of the following:

(1) The button really does work, it’s just set on time delay.
Suppose the elevator is set so that the doors close automatically after five seconds. The close-door button can be set to close the doors after two or three seconds. The button may be operating properly when you push it, but because there’s still a delay, you don’t realize it.

(2) The button is broken. Since a broken close-door button will not render the elevator inoperable and thus does not necessitate an emergency service call, it may remain unrepaired for weeks.

(3) The button has been disconnected, usually because the building owner received too many complaints from passengers who had somebody slam the doors on them.

(4) The button was never wired up in the first place. One repair type alleges that this accounts for the majority of cases.

Gizmodo, more recently, contends that:

…the Door Close button is there mostly to give passengers the illusion of control. In elevators built since the early ’90s. The button is only enabled in emergency situations with a key held by an authority.

Door close button

This is clearly not always true; I’ve just tested the button in the lift down the corridor here at Brunel (installed around a year ago) and it works fine. So it would seem that enabling the functionality (or not) or modifying it (e.g. time delays) is a decision that can be made for each installation, along the lines of the Straight Dope information.

If there’s a likelihood (e.g. in a busy location) that people running towards a lift will become antagonised by those already inside pressing the button (deliberately or otherwise) and closing the door on them, maybe it’s sensible to disable it, or introduce a delay. If the installation’s in a sparsely populated corner of a building where there’s only likely to be one lift user at a time, it makes sense for the button to be functional. Or maybe for the doors to close more quickly, automatically.

But thinking about this more generally: how often are deceptive buttons/controls/options – deliberate false affordances – used strategically in interaction design? What other examples are there? Can it work when a majority of users ‘know’ that the affordance is false, or don’t believe it any more? Do people just give up believing after a while – the product has “cried Wolf” too many times?

Matt Webb (Mind Hacks, Schulze & Webb) has an extremely interesting discussion of the extinction burst in conditioning, which seems relevant here:

There’s a nice example I read, I don’t recall where, about elevators. Imagine you live on the 10th floor and you take the elevator up there. One day it stops working, but for a couple of weeks you enter the elevator, hit the button, wait a minute, and only then take the stairs. After a while, you’ll stop bothering to check whether the elevator’s working again–you’ll go straight for the stairs. That’s called extinction.

Here’s the thing. Just before you give up entirely, you’ll go through an extinction burst. You’ll walk into the elevator and mash all the buttons, hold them down, press them harder or repeatedly, just anything to see whether it works. If it doesn’t work, hey, you’re not going to try the elevator again.

But if it does work! If it does work then bang, you’re conditioned for life. That behaviour is burnt in.

I think this effect has a lot more importance in everyday interaction with products/systems/environments than we might realise at first – a kind of mild Cargo Cult effect – and designers ought to be aware of it. (There’s a lot more I’d like to investigate about this effect, and how it might be applied intentionally…)

We’ve looked before at the thermostat wars and the illusion of control in this kind of context. It’s related to the illusion of control psychological effect studied by Ellen Langer and others, where people are shown to believe they have some control over things they clearly don’t: in most cases, a button does afford us control, and we would rationally expect it to: an expectation does, presumably, build up that similar buttons will do similar things in all lifts we step into, and if we’re used to it not doing anything, we either no longer bother pressing it, or we still press it every time “on the off-chance that one of these days it’ll work”.

How those habits form can have a large effect on how the products are, ultimately, used, since they often shake out into something binary (you either do something or you don’t): if you got a bad result the first time you used the 30 degree ‘eco’ mode on your washing machine, you may not bother ever trying it again, on that machine or on any others. If pressing the door close button seems to work, that behaviour gets transferred to all lifts you use (and it takes some conscious ‘extinction’ to change it).

There’s no real conclusion to this post, other than that it’s worth investigating this subject further.

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Greengaged skip

Design CouncilThe London Design Festival always throws up some interesting events, especially involving clever people trying new things in design and sharing their experiences and expertise.

This year, the Design Council are running Greengaged, a “sustainability hub… developed and organised by [re]design, thomas.matthews and Kingston University with Arup and Three Trees Don’t Make A Forest”. It’s a series of talks and workshops about ecodesign and sustainable issues in design.

On Tuesday I went, along with Alex Plant, for the ‘Behaviour Change’ talks, part of the ‘Gauging the Green’ day, where Unchained‘s Lea Simpson, More AssociatesLuke Nicholson, IDEO London‘s Andrea Koerselman and Fiona Bennie from Forum for the Future all talked about their work on using design to change behaviour.

[Apologies: YouTube have since removed the clip due to an infringement claim from Candid Camera, Inc. So here's an alternative link - it may not last either, though, but if you search for "candid camera" elevator I'm sure you'll be able to find it]

Lea Simpson started with this great Candid Camera clip from 196x demonstrating how easily social proof can be used to influence behaviour. Lea argued three important points relevant to behaviour change (many thanks to Christian McLening for taking better notes than I did):

1. Behaviour change requires behaviour (i.e. the behaviour of others: social effects are critical, as we respond to others’ behaviour which in turn affects our own; targeting the ‘right’ people allows behaviour to spread)

2. Behaviour and motivation are two different things: To change behaviour, you need to understand and work with people’s motivations – which may be very different for different people.

3. Desire is not enough: lots of people desire to behave differently, but it needs to be very easy for them to do it before it actually happens.

Luke Nicholson: Photo by Kate Andrews
Luke Nicholson’s presentation: photo by the indefatigable Kate Andrews.

Luke Nicholson talked about More‘s work on enabling the public to understand energy use and carbon footprints via home monitoring systems – as he put it, there are “some invisible forces going round your home, and this is a lens onto them”. More’s ‘energy lens’ – which can be positioned on a window, hence linking energy consumption and climate/the weather in users’ minds, and making it as easy to check “what the energy’s like today” as “what the weather’s like today” – has recently been spun out as Onzo – who look to be employing a couple of very talented Brunel Design graduates.

More Associates: Energy Literacy

Luke also talked about More’s research with energy literacy – can we create a vernacular for better public understanding of energy, carbon, current, and so on? The above slide showed the idea of ‘pips’ and ‘blocks’ as some kind of accounting unit for energy and carbon, respectively, easily comparable to pounds (sterling) for cost; there was also an interesting series of diagrams using different shapes and sizes to explain simply, visually, the difference between high-current-drawing appliances and those which draw lower currents. Changing consumer demand for new products was also addressed with the idea of a ‘Kept’ sticker which could be affixed to products such as phones, to announce “I’m keeping this”.

A lot of this really does seem to be about framing – and joining up the agendas of different groups (consumers, the electricity industry, manufacturers, governments) to provide a new resultant pointing in the desired direction. As Luke said, “We’re playing into cultures that don’t exist yet.”

Andrea Koerselman, IDEO

Andrea Koerselman and Fiona Bennie introduced their ‘i-team – local innovation on climate change’ project, a service design collaboration between IDEO and Forum for the Future, working with councils and local authorities to inspire behaviour change on issues such as driving to work, reducing electricity usage, and so on. This involves a lot of user observation – an IDEO speciality, of course – and an Inspiration-Insight-Ideation-Implementation process, as in the slide above. Talking to Fiona afterwards, she mentioned that it’s quite a novel experience for many councils to be involved in generating ideas without explicit returns-on-investment or outcomes defined, and so the ‘Ideation’ stage was going to be especially interesting.

Overall, this was a very interesting and worthwhile programme of talks – and this is just a snapshot of the many taking place this week and next in London. Tomorrow, I’m off to some of System Reload’s workshops, and on Monday, back at the Design Council, Tracy Bhamra and Emma Dewberry, among others, will be talking about sustainable design education. I’ll let you know how it all goes.

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Mousewrap - dontclick.it

Dontclick.it, an interesting interface design experiment by Alex Frank, included this amusing idea, the Mousewrap, to ‘train’ users not to click any more “through physical pain”.

It did make me think: is the use of anti-sit spikes on window sills, ledges, and so on, or anti-climb spikes on walls, intended primarily as a Skinnerian operant conditioning method (punishment – i.e. getting spiked – leading to decrease in the behaviour), or as a perceived affordance method (we see that it looks uncomfortable to sit down, so we don’t do it)? How do deterrents like this actually work?

It might seem a subtle difference, and in practice it probably doesn’t matter; it’s probably a bit of both, in fact. Most people will be discouraged by seeing the spikes, and for the few who aren’t, they’ll learn after getting spiked.

But on what level do anti-pigeon spikes work? Do pigeons perceive the lack of ‘comfort’ affordance? Or do they try and perch and only then ‘learn’? How similar does the spike (or whatever) have to be to others the animal has seen? Do animals (and humans) only learn to perceive affordances (or the lack of them) after having been through the operant conditioning process previously – and then generalising from that experience to all spikes?

What’s the accepted psychological wisdom on this?

Spikes
Spikes
Spikes
Spikes
Some spikes in Windsor, Poundbury, Chiswick and Dalston, UK.

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A kettle

Understanding what people really do when they carry out some ‘simple’ task, as opposed to what designers assume they do, is important. Even something as mundane as boiling a kettle to make a cup of tea or coffee is fraught with variability, slips, mistaken assumptions and so on, and can be studied in some depth to see what’s really going on, or could be going on (e.g. this analysis from 1998 by my co-supervisor, Neville Stanton and Chris Baber). Everyday tasks can be complex.

Joe Davis: Telescopic Text

So I was fascinated and very impressed with Telescopic Text from Joe Davis (found via Kate Andrews‘ eclectically excellent Anamorphosis)

This is very clever stuff – well worth exploring.

Joe Davis: Telescopic Text

Joe Davis: Telescopic Text

As Joe’s meta description for the page says, this is “an exploration of scale and levels of detail. How much or little is contained within the tiniest, most ordinary of moments.” What scripts are embedded here for the user in this system of kettle, mist, mug, stale biscuits?

The dominating level of detail reminds me a bit of Tom McCarthy’s Remainder, a novel almost entirely about interaction between people and environments. Or perhaps some of Atrocity Exhibition/Crash-era Ballard, where interactions between people, objects and spaces are broken down endlessly, obsessively.

Joe Davis: Telescopic Text

Back to kettles for a moment: they’re going to feature more heavily on the blog over the next year, in various forms and on many levels. More than almost any other energy-using household product, they’re ripe for the ‘Design for Sustainable Behaviour‘ wand to be waved over them, since almost all the wasted energy (and water) is due to user behaviour rather than technical inefficiency. It’ll be more interesting than it sounds!

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@danlockton

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